Method of making paper receptacles.



D. J. JENNINGS.

METHOD ,OF MAKING PAPER RECEPTACLES.

' APPLICATION FILED MAY 5. I917.

l 973 Patented Apr. 15, 1919.

DAVID 3'. JENNINGS, OI" CLEVELAND, OHIO.

METHOD OF MAKING PAPER RECEPTACLES.

Application filed my 5.1917. Serial No. 166,590.

To all whom it may concern: Be it known that I, DAVID J. JENNINGS, a

citizen of the United States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new and useful Improvement in Methods of Mak ing Paper Receptacles, of which the following is a full, clear, and exact description,

reference being had to the accompanying drawings.

p This invention relates to a method for making paper receptacles. The essential object is to facilitate the manufacture of paper receptacles by saving time in the handllng of materials and reducing the number of operations required.

In the manufacture of paper receptacles, such for example, as milk-bottles, serving receptacles, small cheese tubs, andthe like, it has been the usual practice to form the sides of the receptacle and then force the bottom and top closures into position. A more specific object of my invention is to eliminate the operation of placing one of the end members in position by forming the side of receptacles about the closure and causing the edge of such end closure to press a groove into the side walls permanently positioning it. The end closures are usually made of comparatively stiff paper board, and I have found that by distorting the same from a plane during the formation by a concave and a convex surface, that this gives the closure a crowned efiect causing it to press outwardly against the side walls by reason of its tendency to return to its normal plane, thus insuring a tight fit.

The drawings illustrate a receptacle made according to my process and also illustrate the means for carrying out the same, and the invention is hereinafter more fully described in connection with the drawings, the essential characteristics being summarized in the claim. y

In the drawings, Figure 1 is-a side elevation of the forming mandrel cooperating with a platen shown in section; Fig. 2 is a side elevation of the mandrel showing the method of placing the bottom in position; Fig. '3 is a plan of the'blank for forming the side of'the receptacle shown on a reduced scale; 'Fig. 4: is a. vertical section through the receptacle.

Describing the drawings-by the use of reference characters, 1 indicates a tapered, or frusto conoidal, mandrel having an out- Specificationof Letters Patent.

Patented Apr. 15,1919.

wardly projecting bead 2 adjacent one end and a shaft or stem 3. A vacuum passage 5 communicates with the exterior of the mandrel and leads ,to a passage 6 extending along the stem At the reduced end of the mandrel is shown a concave surface 7 against which the receptacle bottom 10 is forced by a convex surface 11 on the head 12 forming an end section of the mandrel and rotatable on a shaft 14.

. The mandrel shown is adapted to roll along a platen surface curved and beveled to fit against the side of the mandrel as the mandrel is moved about a center at which is provided a suitable pivotal connection for the shaft 14. This general arrangement of tapered mandrel and curved pathway is shown and described in my prior application No.'29,119-, filed May 19, 1915.

The platen20 is provided with a. groove 22 cooperating with thebead 2 to form a groove in the side of the receptacle. The receptacle shown in Fig. 4; is in the form of a small flaring tubhaving a bottom 10 with its periphery closely fitting a groove formed by the outwardly extending head 31 of the .side of the receptacle. The receptacle side '30", Fig. 1. The head 32 at the upper por tion of the receptacle may receive a top closure forced into the same after being filled.

The manner of carrying out my process (which may be accomplished by the above described or any other suitable mechanism) is as follows:

The head 12 is separated from the mandrel and the upper disk 10 placed between it and the mandrel as shown in Fig. 2. The head is then brought tightly against the disk giving it its concave or crowned form. The diameter of the disk is such that it projects outwardly'from th'e mandrel and when properly centered with relation to the same it provides a flange projecting outwardly from the surface of the closed mandrel. T'he periphery of the diskis then brought into alinement with the groove 2 1 in the platen. The blank forming the sides of the receptacle having been placed on the platen, the mandrel is caused to roll along the same, the paper curling about the mandrel by reason of vacuum in the passages 5 and 6 sucking the end portion 30 into close contact with the side of'the mandrel, This blank may be previously formed. It may be formed by movement of the platen through a surrounding dieor by rotary knives at each end of the mandrel, acting to cut the blank from a sheet as desired.

As the mandrel rolls it is pressed closely against the paper on the platen causing the periphery of the disk 10 to depress the paper into the groove forming the bead 31. This may or may not distort the periphery of the disk, but in either instance it causes a very tight fit of the disk in the groove of the side. The bead 2 causes a similar depression of the paper into the groove 5220f the platen,

thus forming a groove which may receive a crowned or uncrowned disk-closing the top of the receptacle.

The platen ispreferably long enough to permit the mandrel to, turn something more than two complete revolutions and the blank may be made-of suitable length to Wind twice around the mandrel, the ends overlapping as indicated in Fig. 4. As the mandrel turns, paste is applied to the outer side of the paper. Thus, between the two layers is a layer of paste or glue securely holding the layers and retaining their shape. Thebead -2 is preferably made collapsible, so that after forming the receptacle the drawing of the head 12 away from the mandrel may remove the cup by vacuum applied to the bottom disk 10 through an opening 15 in the shaftv 14.

Having thus describedmy invention,what

I claim is:

The method of forming paper receptacles, comprising wrapping sheet material to become a side wall of the receptacle face-Wise against the edge of a disk in such a manner as-to extend the paper each way from the disk at an abrupt angle to its face and during'this Wrapping operation pressing the disk and sheet material together, thus forming a shoulder in the material of the side wall at each side of the disk, and during such pressing operation supporting the disk in a manner to distort the central portion thereof from its normal plane, leaving its periphery in the normal plane, whereby the disk may become a wall of the receptacle, and upon the finishing of the rolling operation releasing the disk allowing it to press outwardl to the wall of the receptacle by reason 0 its tendency to assume its normal plane.

In testimony whereof, I hereunto aflix my signature.

' I DAVID J. JENNINGS. 

